== Operational footprint, measured on one 2-core / 3.8 GB Linux box ==

Each broker started from its shipped distribution with default configuration and a
700 MB heap cap, on Temurin JDK 21. Times are one sample on a small box: treat them as
orders of magnitude, not as a benchmark.

broker                      : kafka
time from launch to first
  accepted connection       : 10035 ms
resident memory at idle     : 333 MB
server processes            : 1
listening ports             : 9092 (broker), 9093 (controller)
unpacked distribution size  : 135 MB
settings in shipped default
  configuration file        : 24   (server.properties)

broker                      : rabbit
time from launch to first
  accepted connection       : 15053 ms
resident memory at idle     : 115 MB
server processes            : 1
listening ports             : 5672 (AMQP), 4369 (epmd), 25672 (inter-node)
unpacked distribution size  : 26 MB
settings in shipped default
  configuration file        : 0   (rabbitmq.conf.example)
epmd processes            : 1
NOTE: RabbitMQ ships no configuration file at all. rabbitmq.conf.example is
      entirely commented out and the boot log records "Config file(s): (none)".
      Everything in that file is documentation, not a default.

broker                      : pulsar
time from launch to first
  accepted connection       : 20801 ms
resident memory at idle     : 610 MB
server processes            : 1
listening ports             : 6650 (binary), 8080 (admin/REST), 2181 (ZooKeeper)
unpacked distribution size  : 344 MB
settings in shipped default
  configuration file        : 357   (standalone.conf)